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IMP's (Immaculate Marginal Protection) are 'brass' micro wires that have a regular taper. They are the ideal basis for any experienced leader's rack of micro gear.

When developing these nuts DMM gradually honed in on an alloy and a hardness that allowed both good bite and also a good resistance to shear forces - this way the nuts lock into the rock well and also resist being pulled through the placement. Colour coding means you select the right nut first time, every time.

If you wish to return any climbing equipment or helmet that you purchased from our website or by phone for a refund or exchange, you must do so within 14 days of receiving the item. Please read our Returns and Exchanges policy for more information. This does not affect your statutory rights.